This paper presents an on-going research project on development of a wireless sensor node equipped a MEMS accelerometer, which is aiming to design a wireless sensor node to meet specific requirements of the drive-by bridge monitoring for short span bridges. The performance of a trial piece of the sensor node is investigated through vibration tests on a model bridge in laboratory and a real pedestrian bridge. This paper also covers brief statements about the sensor node. The results indicate that acceleration responses taken from the wireless sensor node are comparable with those from the conventional sensing device with wired acceleration transducers.